Cameco Corporation
US ˙ NYSE ˙ US13321L1085

SecurityCCJ / Cameco Corporation
InstitutionMarex Group plc
Latest Disclosed Ownership26,908 shares
Latest Disclosed Value $ 2,922,478
Marex Group plc reports 108.61% increase in ownership of CCJ / Cameco Corporation

On May 13, 2026 - Marex Group plc filed a 13F-HR form disclosing ownership of 26,908 shares of Cameco Corporation (US:CCJ) valued at $2,922,478 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 12,899 shares of Cameco Corporation. This represents a change in shares of 108.61% during the quarter. The current value of the position is $2,783,364 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F CAMECO COM 13321L108 26,908 14,009 108.61 2,922 147.63 0.0120
2026-02-12 2025-12-31 13F CAMECO COM 13321L108 12,899 4,309 50.16 1,180 63.89 0.0074
2025-11-14 2025-09-30 13F CAMECO COM 13321L108 8,590 8,590 720 0.0051
2025-08-19 2025-06-30 13F CAMECO COM 13321L108 0 -8,833 -100.00 0 -100.00
2026-04-02 2025-03-31 13F CAMECO COM 13321L108 8,833 -13,992 -61.30 364 -69.03 0.0070
2026-04-02 2024-12-31 13F CAMECO COM 13321L108 22,825 -9,420 -29.21 1,173 -23.90 0.0200
2026-04-07 2024-09-30 13F CAMECO COM 13321L108 32,245 10,621 49.12 1,540 44.87 0.0351
2026-04-02 2024-06-30 13F CAMECO COM 13321L108 21,624 7,246 50.40 1,064 70.90 0.0286
2026-04-02 2024-03-31 13F CAMECO COM 13321L108 14,378 2,481 20.85 623 21.48 0.0202
2026-04-02 2023-12-31 13F CAMECO COM 13321L108 11,897 3,514 41.92 513 54.22 0.0202
2026-04-02 2023-09-30 13F CAMECO COM 13321L108 8,383 8,383 332 0.0470
2026-04-02 2023-06-30 13F CAMECO COM 13321L108 0 -12,495 -100.00 0 -100.00
2026-04-02 2023-03-31 13F CAMECO COM 13321L108 12,495 3,469 38.43 327 59.80 0.0433
2026-04-02 2022-12-31 13F CAMECO COM 13321L108 9,026 9,026 205 0.0291
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.